Blank cutting machine



.April 19, 1949. A. A. GRAY ET AL 2,467,666

BLANK CUTTING MACHINE Filed Sept. 15, 1947 2 Sheets-Sheet l 27 E1901. v 2 2 5g A. A. GRAY ET AL BLANK CUTTING MACHINE April 19, 1949.

2 Sheets-Sheet 5 Filed Sept. 15, 1947 Patented Apr. 19, 1949 UNITED STATES PATENT OFFICE BLANK CUTTING MACHINE Allen A. Gray and Albert Brookhart, Muscatine, Iowa Application September 15, 1947, Serial No. 774,136

7 Claims. (CI. 7916) 1 2 Our invention is a novel improvement in butcylindrical bore 3a (Fig. 2) in alignment with ton blank cutting machines of the type shown the tubular saw 6, said bore having its outer end in U. S. Letters Patent No. 659,191, issued Octointernally threaded as at 31) for the reception ber 2, 1900, to N. Barry, Jr., and the principal of a plug-nut 1 having a bore Ia of less diam object thereof is to provide a simple, novel and 5 eter than the bore 3aof the tail stock. The inner efficient manually operated means for advancend of bore 3a is provided with a keyway 30 for ing and retracting the feed plunger of the tail a key 8 which is held axially therein by means stock-of such machines. of 9. lug 8a entering a recess in the bottom of Ordinarily the tail stock of such blank cutting keyway 3c. machines includes a plunger, screw, thrust bear- 10 Axially slidably mounted within bore 311 is a ing, and ratchet. The tail stock is bored to suit plunger 9, Which is preferably ll and h n the diameter of the plunger which has a keyway; internal flange 9a adjacent its inner end; and and in the bore of the tail stock is a stationary a wooden plug In (Fig. 1) is adapted to be inkey on which the plunger slides, allowing the ser ted into the inner end of the plunger seating plunger to advance and retract without turning. 5 against the flan e 9a, plu orming a back- The plunger has, at its end near the tubular ing fo h ldin t ll S (Fig. 1) against the saw, a bore into which is fitted a wooden plug, ub ar aw 6 during e c tt ope at The hn rth ther end of the plunger has a tapped outer end of the bore of plunger 9 is reduced in bore into which the screw is threaded, the screw diameter and is threaded as at 91) for receivin being held against axial movement by the thrust a threaded screw I I which telescopes the plunger bearing. The end of the screw which protrudes 9, whereby rotation of Screw I l ove t beyond the thrust bearing carries the ratchet p u a a y Of the bore which is usually provided with handles to per- As shown in Fig- Screw H is Provided mit turning so that the screw will run the plungjacent the plug-nut l with an annular flange er forwards and backwards. This ermits the Ila opposit t e nlar d t r end 1b of r wooden plug to be positioned up against the back Ia of plug-nut I, a thrust collar I2 setting against of the shell to be cut, the plug holding the shell the shoulder at the end of bore Ib. Anti-fricagainst the tubular saw which has teeth for cut- .tion balls I3 are housed around screw I I between ting out button blank from the shell. After the the flange a the ust 0011211 e blank has been cut the handles are swung to outer end of plug- 1 is provided with an enre'turn the plunger to starting position. our inar d bore 1o re i an ant -fri tion bearvention eliminates the necessity of using this s having one hell e I to setting in e ratchet. cess 1c, the balls I4 contacting a ball-race cone We will explain the invention with reference threaded p e ut n of t e c e to the accompanying drawings, which illustrate Y reason f the above Construction, the Screw one practical embodiment the of, t ename I I is rotatable within the bore 311 of the tail stock others familiar with the art to adopt and use the t is p v t d f m a al m v m nt t erein.

same; and will summarize in the claims, the novel on Outer End of screw ll yo one l5 features of construction, and novel combinations s a p n o l6 Which is keyed thereon as at I'Ba of parts, for which protection is desired. 40 and retained y a nut (Figthreaded 011 In said drawings: the reduced outer end I II) of screw I I. Figure 1 is a perspective View of b tt blank An inverted V-shaped frame 20 is mounted cutting machine embodying our invention. upon the side of the tail Stock 3 by means Fig. 2 is an enlarged longitudinal section bolts or the like (Figs 3 4) passin through t tailstock thereof, through the lower ends of the legs of the frame Fig. 3 is an end elevation of the tail stock. and into the toil Stock 3, the upper ends of he Fi 4 is a d elevation of the tail Stock legs converging and being flanged together as at As shown, the button blank cutting machine (Fige frame 20 slopes upwardly to comprises b I (Fi 1 having t one end one side of the tail stock 3 as shown in Fig. 3, h d Stuck 2 and at the opposite end a tail and is held in such position by means of a rod 22 stock 3. Journaled in h d Stock 2 i a shaft having one end anchored in the tail stock 3 and carrying a stepped belt pulley in the usual manhaving its outer end bent and passing through her whereby the shaft may be rotated at difiera perforation in on of t e ss f the frame ent speeds. At the inner end of the shaft of a nut 3 preventing withdrawal of e rod 22 head stock 2 is a collet 5 in which is mounted 5 from the frameatubular cutting saw 6. A stub-shaft 20 passes through a hole in the The tail stock 3 is axially shiftabl-e on guides contacting flan s 20a and is s u ed in p si- I on base I toward or from the head stock 2 and tion therein by nuts 25 and 26, as shown in Fig.

is securely bound in adjusted position by means 4, so that the. shaft will be fixed relatively to the of clamp 8. Tail stock 3 is provided with a 0 frame 20. Rotatably mounted upon shaft 24 is the hub. 21a of a gear 21 of relatively large size and disposed opposite and meshing with the pinion 50 on. screw H, as shown in Figs. 1 and 3. Gear 2! has a gap 212) in its periphery as shown in Fig. of such width that when the gear 27 is rotated to bring the gap opposite pinion Hi, the pinion will be unmeshed from the gear 21. Gear 21 is provided with an operating lever 28 which is bolted as at 29 thereto at opposite sides of the shaft 24, lever 28 being provided with a handle 30 at its outer end. In order to counterbalance the weight of the handle 2830 a weight Si is suspended by a strap 32 from the gear 21 at the side opposite from the handle 30. The operator can turn the gear 21 to drive the pinion [3 until gap 211) is reached, after which the gear 21 is unmeshed from the pinion It. At this point the pinion l6 may be readily rotated by the operators hand. This enables the operator to move the plunger 9 backward and forward within the bore 3a to initially locate the wooden plug 19 to position the shell S against or touching the tubular saw 6, the rotation of the pinion I6 by hand rotating the screw II which enages the threaded portion of the plunger 9. When the shell is thus initially located, contacting the tubular saw 5, the operator then further rotates the gear 2'! using the increased leverage of the handle 30, thereby returning the gear 21 into mesh with the pinion l6 and forcing the plug [0 further toward tubular saw 6, causing the saw 6 to cut through the shell S and produce a button blank.

We do not limit our invention to the exact form shown in the drawings, for obviously changes may be made therein within the scope of the claims.

We claim:

1. In a button blank cutting machine having a head stock in which is journaled a rotary tubular saw and having a tail stock in which a plunger is slidably mounted axially of the saw, said plunger being actuated by a feed screw; a pinion on said feed screw; a stub shaft mounted on the tail stock parallel with the feed screw; a gear on said shaft normally meshing with said pinion; manual means for rotating said gear; said gear having a gap in its periphery, whereby when the gear is rotated to bring the gap opposite the pinion the gear will be unmeshed from the pinion to permit the latter to be directly manually rotated.

2. In a button blank cutting machine having a head stock in which is journaled a rotary tubular saw and having a tail stock in which a plunger is slidably mounted axially of the saw, said plunger being actuated by a feed screw; a pinion on said feed screw; a stub shaft mounted on the tail stock parallel with the feed screw; a gear on said shaft normally meshing with said pinion; an operating lever mounted on said gear and projecting beyond the periphery thereof 4 said gear having a gap in its periphery, whereby when the gear is rotated to bring the gap opposite the pinion the gear will be umneshed from the pinion to permit the latter to be directly manually rotated.

3. In a machine as set forth in claim 2, a counterbalancing weight on the gear at the opposite side from the lever.

4. In a button blank cutting machine having a head stock in which is journaled a rotary tubular saw and having a tail stock in which a plunger is slidably mounted axially of the saw, said plunger being actuated by a feed screw; a pinion on said feed screw; a frame mounted on one side of the tail stock, a stub shaft carried by said frame parallel with the feed screw; a gear freely rotatable on said shaft and normally meshing with said pinion; an operating lever mounted on said gear and projecting beyond the periphery thereof; said gear having a gap in its periphery, whereby when the gear is rotated to bring the gap opposite the pinion the gear will be unmeshed from the pinion to permit the latter to be directly manually rotated.

5. In a machine as set forth in claim 4, a counterbalancing weight on the gear at the opposite side from the lever.

6. In a machine as set forth in claim 4, said frame being of inverted V-shape; said legs converging at their upper ends and having contacting flanges; and said stub shaft passing through an opening in the contacting flanges and carrying heads contacting opposite sides of the said flanges.

7. In a machine as set forth in claim 4, said frame being of inverted V-shape; bolts partially connecting the lower ends of the legs of the frame to the ends of the tail stock; said legs converging at their upper ends and having contacting flanges; a rod anchored to the tail stock and having its outer end passing through a perforation in one leg to maintain the frame in fixed angularity with respect to the tail stock; and said stub shaft passing through an opening in the contacting flanges and carrying nuts at opposite sides of the said flanges.

ALLEN A. GRAY.

ALBERT BROOKHART.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 303,897 Thomas Aug. 19, 1884 749,079 Miller Jan. 5, 1904 966,253 Smith Aug. 2, 1910 1,068,129 Hess July 22, 1913 1,328,742 Koch Jan. 20, 1920 1,425,007 Granlund Aug. 8, 1922 1,442,794 Chalmers Jan. 23, 1923 

